FIRECLASS Fire detection system Changing a Fuse on the PNI800
Installation Guide Doc. version 2.0 34
13.1 Changing a Fuse on the PNI800
The PNI800 has two fuses. Only one of the fuses is user
replaceable. See Table 31 for more information.
To replace the FU1 fuse, complete these steps:
1 Identify the blown FU1 fuse on the board visually or
by checking for continuity with a multimeter.
2 Insert a screwdriver under the centre of the fuse and
pull it out.
3 Check that the replacement fuse is of the correct
current rating.
4 Put the replacement fuse on top of the connector,
taking care that the current number is facing
upwards, and press it down firmly.
SW2 Emergency MCU FW
Upgrade Mode
Position 8
ON Enabled. Mode is acti-
vated after RESET
OFF Disabled*
Table 26: PNI800 - Emergency MCU FW upgrade mode enable
* Default.
SW2 Position Network Left and
Right Terminator
3 4 5
OFF OFF OFF Left and Right Enabled*
(default)
OFF ON OFF Left Disabled
OFF OFF ON Right Disabled
OFF ON ON Left and Right Disabled
ON OFF OFF Reserved
ON OFF ON Reserved
ON ON OFF Reserved
ON ON ON Reserved
Table 27: NI800 - Network Interface Terminator setting for
metal cable
* Default setting in normal operation for Bus and Ring network
topology
SW3 Network address
Position 1 to 7
ON Binary coded network
address
SW 3.1=LSB
SW 3.7=MSB
ON=1
OFF=0
OFF
Table 28: Network Address Setting
SW3 Test Mode
Position 8
ON Enabled
OFF Disabled*
Table 29: PNI800 - Test Mode setting
* Default.
SW4 NBUS address
Position 1 to 7
ON Binary coded NBUS
address
SW 4.1=LSB
SW 4.7=MSB
ON=1
OFF=0
OFF
Table 30: PNI800- NBUS address setting
CAUTION
Ensure that you turn the panel off before
changing a fuse.
Fuse number Current Voltage Type
FU1 0.5A 125V SSTC500
Table 31: User changeable fuse on a PNI800
Note
Replacement fuses are not supplied. Pur-
chase replacement fuses separately.
DANGER
Ensure that the replacement fuse is of the
correct current rating. Failure to insert
the correct fuse can lead to injuries and
damage to the equipment.
If fuse FU2 needs replacing, send the
board for repair.
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